Home › Jaguar › 2023 › F-Pace SVR › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index - DTC: TELEMATIC Control Module (TCU) -- F-Pace/X761 › Diagnostic Trouble Code Index - DTC: TELEMATIC Control Module (TCU) (G2723514) › Description And Operation › TELEMATIC Control Module (TCU) › DTC U2109-91: Back-up Battery - Parametric › Possible Causes